Women, children and UN staff were among those killed during the shelling of a UN-run school in northern Gaza, in which hundreds of people had taken refuge. United Nations Secretary-General Ban Ki-moon expressed outrage and horror at the tragedy.

“I am appalled by the news of an attack on an UNRWA (United
Nations Relief and Works Agency for Palestine Refugees in the
Near East) school in Northern Gaza where hundreds of people had
taken refuge,” Ban said in a statement published on the UN's website, adding that
“circumstances are still unclear.”

An Israel Defense Forces (IDF) blog post published on Thursday
accused Hamas of firing from Beit Hanoun, a city in the
northeastern Gaza strip where the shelled UNRWA school is
located.

“Hamas continued firing from Beit Hanoun. The IDF responded
by targeting the source of the fire. Also today, several rockets
launched from Gaza toward Israel fell short and hit Beit
Hanoun,” the IDF stated.

However, Israel's army had obtained “precise
coordinates,” according to a UNRWA spokesman.

“Precise co-ordinates of the UNRWA shelter in Beit Hanoun had
been formally given to the Israeli army,” Chris Gunness
tweeted.
"It's clear that civilians are paying an unimaginable price
caught between both sides," Gunness told Reuters. "There
are reports of Hamas rockets falling around Beit Hanoun at the
same time. We were attempting to arrange a window for evacuation
for the civilians with the Israeli army that never came. The
consequences were deeply tragic."

Laila Al-Shinbari, a woman who was at the school when it was
shelled, told the agency that families had gathered in the
courtyard when the shells struck.

“All of us sat in one place when suddenly four shells landed
on our heads...Bodies were on the ground, [there was] blood and
screams. My son is dead and all my relatives are wounded
including my other kids,” she cried.

Medical centers in the same area have been treating the injured
over the course of the day. “Such a massacre requires more than
one hospital to deal with it,” Ayman Hamdan, director of the Beit
Hanoun Hospital said.

US Department of State spokeswoman Jen Psaki stated that the
attack “underscores the need to end the violence and to
achieve a sustainable ceasefire and enduring resolution of the
crisis in Gaza as soon as possible.”

“We again urge all parties to redouble their efforts to
protect civilians,” she said on Thursday.

A batch of rockets was also discovered at a nearby UNRWA school
on Tuesday.

“Today, in the course of the regular inspection of its
premises, UNRWA discovered rockets hidden in a vacant school in
the Gaza Strip,” the organization said in a statement on
Tuesday.

The previous Wednesday, UNRWA found some 20 rockets during a
standard inspection in a school that it was overseeing.

The fighting between Israel and Palestine has been ongoing for 17
days. The overall death toll from the conflict has climbed to
over 750.